Shinga
A bounty Hunter belonging to Galactic Federation between Prime 2 and Prime 3. Shinga was a girl with Lekku coming from her head. She is very similar to the Twi'leks in Star Wars. She had the power to shoot lightning balls from he hands and had a Paralyzer gun very smilar to the one Samus owned. She could withstand Phazon because she was immune to it. That resulted in not being corrupted when Dark Samus fired at her initially trying to corrupt her.

Ciro

A male bounty hunter belonging to the Galactic Federation between prime and prime 3. Ciro was the same species as Gandrayda. He could shapeshift just like Gandrayda. He never met Samus Aran. He died when space pirates attacked Norion. He went to activate the generator that Rundas had activated, but was killed when a Berserker Lord came rampaging through the generator room.

Admiral Corpo

A male admiral in the Galactic Federation between Metroid and Metroid 2: Return of Samus. Admiral Corpo didn't serve in the Galactic Federation for very long. He was killed when space pirates raided a land base on an unknown planet.